Observations On Mental Derangement is a book written by Andrew Combe that explores the application of phrenology to the understanding of mental illness. The book delves into the causes, symptoms, nature, and treatment of insanity, using the principles of phrenology as a guide. Phrenology is a pseudoscientific theory that suggests that the shape and size of the human skull can reveal information about a person's personality and mental abilities. Combe's...